Plastic Manufacturing Technology — Summer 2018

Define: Plastics Processing Techniques.

Explain injection moulding process & its cycle time.

Explain any five common injection molding defects with its cause & remedies.

Explain back pressure, suck back & drooling.

Differentiate b/w hydraulic clamping & toggle clamping.

Write short note on Technical specification of injection moulding machine.

Write comparison b/w compression & transfer moulding process.

Write the advantages of transfer moulding process over compression molding process.

Explain compression moulding process.

Write short note on compression moulds with diagram.

Write the applications of extrusion process.

Explain heating & cooling system in extrusion process.

Write short note on types of dies used in extrusion.

Explain the function of screen pack & breaker plate.

Explain shark skin, melt fracture & bam booing.

Write short note on Blown film plant.

Explain about tie layer.

Discuss different types of materials used for blow moulds.

Explain Blow moulding process & give its classification.

Explain extrusion blow moulding process.

Differentiate b/w extrusion blow moulding process & injection blow moulding process.

Explain parision programming.

Write the principle of thermoforming process.

Discuss Matched Die forming.

Explain pressure forming process with neat sketch.